1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194854110de0a4555bb84ca2a143e21d1456523af464c77806b1f421c2339342. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c262d2b-e322-47af-9af4-c4e8f831315d.json and https://artists.proofprofile.net/proofs/artist/9c262d2b-e322-47af-9af4-c4e8f831315d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd252a99185e55d775ece92f1c1fe5b1b103114e1356215ebd54e3860d593a1bd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2196421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d8a08d206e79f86302dd8e0b9ba97a22fb44d22a40177afcc0e450ad8ddf21. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32107353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531047fc49a7305f0e29713d1caa8721552cda27a1e41cd50a4cc34443d6a738. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32108722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f447c3c60dc73e53e75f99725f5953bdc29bc5f4e095de65f2d7a46c8b73123. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32108723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cc1de448901a0eb24b9498fff879427c52ae8c15e9ada93ffeb186401bb2c4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32108726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40e2b57dcf23eacc3468fdcfd59679d3f66ea6ff7f110ea314ea26592a605dd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32108727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fe63edc2bbf673c4be97792f4eb88b60d4d5a8b0fa5cb6a0092a6a3b72dfe6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32108728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d303220577f90d5212a6eecdea7b4e6ef17062c02461d422ada3f7200eb8b68. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU9653264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a298cbe3c60d00ffeeeaef8a3678c35ce23310ba0e6a01628d6111d6e25870. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU9653282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29814ba19bc207995a8029cb07a4f905a739bf8b75ad77410a986db0693ac61. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU9653429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6ed99c0bcefe265cef6b7b325e040905cee123e6fd81f03021a7b987dbe7dd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU9653525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d6303220741af3539c405f6d01d310f1ba6e53d82abfca4c4d41ffaebf4043. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2191229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd3cf65fd2ae1aca3b993c37064b1815ad99ec1a7b697a6de1087d855a7194b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2145627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c40a5000fe56779dde4eccd9ce80431416758f9fb1c90ab8188be0e620db4f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2145628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae1b0bb3c1c979af2873d3fde950f7ab8e3b46e29266b6d7ecce5c20c8d9d03. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2145630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bc5e6da989d6fa207c2093cbf8aa7b86cd232d846925aaea90abc8792ec7c2. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2197957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e4a74565f9dba1617102f5b3ba65c05ec08e029b421633baea71a610f6e27a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542100650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd77294e4007ab97ec7a8ac8e4c5d07df931c49fb314792b3249b5e1bf95a3d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542100651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5292c0f3e0ea19df2f0c3798088bb162b15f2a28a4abf3d2e25e96f7d0a148d2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542100652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebee8e59afb320d7c79b298f488f90e85f7299c7145b66223df477c8c28ebfaf. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542100653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67453167d252747a3f8910ab5382dd592656dda784b10e7e5600e1f3542976c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542100655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc422b9eac60ef1de9d8929dc7326ed33cb5934d17eb542cbec0ab6d18ff14ad. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542100659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db5a2a4ba7326dfb3a6508810377242c25bce020574336f1394eef957de3e2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542100660.
Homenaje Al Maestro Felipe Orozco Vásquez